Well, the four (living) Great Dragons that come to mind as being most active in 4th and 5th are Hestaby, Lofwyr, Celedyr, and Sirrurg. Lofwyr because anything involving SK involves Lofwyr eventually. Hestaby and Sirrurg for the dragon civil war. Celedyr for the whole CFD thing. The only times we've actually seen GDs going out and actually doing things, rather than behind the scenes fun, is the assault on Alamais's base, Hestaby attacking SK's middle east HQ, and Sirrurg being Sirrurg in Aztlan. Oh, and Ghostwalker and Harlequin going mano-a-mano in downtown Denver.